Metal casting



D. CORDINO METAL CASTING Original Filed August 1. 1924 m/mw 7 ,v 6 2 9 100 m m I H J Patented June 8, 1926.

ITEE) STTES DOMINICK COR-DINO, 0F PLYMOUTH, MASSACHUSETTS; ELMER L.BRIGGS EXECUTOR.

OF Tit-IE WILL OF DOMINIGK CORDINO, DECEASED.

METAL CASTING.

Original application filed. August 1, 1924, Serial No. 729,499. Divided.and this application filed April 10,

My invention relates to metal castings and to the methods of making thesame, and consists of improvements upon the inventions described andclaimed in the two Letters Patent of the United States issued to me anddated and numberedrespectively, 1,456,868 dated May 29, 1923, and1,456,869 dated May 29, 1923, and of certain novel devices andinstrumentalities employed iii the process of casting metals.

The objects of my invention, among other things, are to accomplish allthe advantages of the inventions of my said two Letters Patent in a moreeflicient and economical manner and with more simple and inexpensivedevices; some of the other objects are to provide a chaplet of novelconstruction, to cast lugs with openings therethrough and at any desiredangle to the main body of the casting, and to form such lugs at agreater variety of elevations above the main body of the casting thanhas heretofore been attainable.

As stated in the specification of said two Letters Patent, it is wellknown that in fastoning panels to stove doors, and in securing togetherfixtures of various kinds in gas and oil stoves and other castings forthe purpose of concealing the fastenings on the face of the work, it iscustomary to cast a lug or lugs on the inside of one casting and todrill and tap a screw threaded hole therein for the reception of a boltor screw. These means are subject to a number ofobjections, and amongthem are: first, the danger of forcing the drill through the casting andthereby destroying or defacing it; secondly, of breaking the tap by notjudging the dis tance accurately and by driving it against the bottom ofthe hole. In some situations it is awkward to use the drill and tap because of difficulty of access to the particular position of the lug, allof which accentuates the risk of forcing the drill through the castingand breaking the tap, and also makes accurate drilling and tappingdifiicult, if not impossible.

It is often necessary or desirable to have the lugs elevated above thepattern at different heights, either by raising the chaplet on a slightsupport or by setting it deeper Serial No. 22,080.

into the pattern, both of which can be accomplished by this inventionmore conven iently and efficiently than by any means heretoforeemployed.

In the accompanying drawing illustrating some of the devices andinstrumentalities employed by me in practicing my invention, Fig. 1 is aperspective view of an attachment to be secured to the pattern used informing the mold for the casting; Fig. 2 is a perspective view of myimproved chaplet to be incorporated into the casting during the moldingprocess; Fig. 3 is a perspective view of the chaplet after the mold hasbeen formed and is ready for the pouring of the metal; Flg. 4t is aperspective view of a lug having my chaplet cast therein, and Fig. 5 isa vertical section of the lug shown in Fig. 4. Fig. 6 is a perspectiveview of the chaplet supported at an angle on the pattern. Fig. 7 is acasting embodying my invention, having several lugs formed thereon.

Similar numerals indicate corresponding parts throughout all the figuresof the drawmg.

In my present invention I dispense with the use of a nut, and make thechaplet of thin sheet metal and of different form and of less metal thanthe chaplet shown in my said two Letters Patent. I have discovered thatit is unnecessary to use a core in any portion of the chaplet in formingthe mold for the casting, as the sand will flow into the chaplet andfill it when the mold is being formed with the exercise of ordinary careand skill. v

The first step in my improved process is to secure to the pattern one ormore attachments 16 like that shown in Fig. 1, made of any suitablematerial, preferably brass, the number and location of these attachmentsbeing governed by the requirements of the form of a particular casting.The attachment 16 preferably has a depression 13, and is provided with aslit or narrow recess 13 on each side of the depression 13. The slits ornarrow recesses 13 are adapted to receive the free ends of the chaplet9, fitting snugly therein, and the recesses 13 are of suflicient depthso as to enclose the ends of the chaplet above the holes 9, 9 Theprovision of the depression 13 in the attachment 16, makes itpracticable to use a lug of less height than heretofore, and still toavoid a contact between the end of the screw or bolt and the bottom ofthe lug.

Fig. 7 illustrates a casting 8 designed to have another casting or panelsecured to it at the four points indicated by the lugs 19. In moldingsuch a casting as 8, there would be four of the attachments 16 securedto the pattern in the same relation, of course, to eachother as the lugs19, on the casting shown in Fig. 7. Before making the mole a chaplet 9,shown in Fig. 2, made of sheet metal or other suitable material, isinserted in each attachment 16 on the pattern. The chaplet 9 ispreferably made of sheet iron, in the top of which a hole 18 is punchedand the metal swaged into a tubular clownwardly extending portion 12,which is screw threaded internally to receive the bolt 15 shown in Figs.4 and 5.

The pattern with its attachments 16,as many as may be required in agiven instance, and each attachn'ient containing a chaplet mounted uponit as described, is then placed in the molding sand in the usual mannerfor casting with the attachments 16 on the up per side of the pattern.In forming the mold the sand will fill the chaplet 9 and thedepressionin the attachment 16, and when the cope is raised from the drag, thechaplet 9 being light and loosely resting in the attachment 16, islifted by the cope to which it adheres, carrying the sand which fills itand that which fills the depression 13 in the attachment 16. The patternis then removed from the drag, the cope is closed and the metal ispoured in the usual manner. 'By reason of the holes 9 in the chaplet 9,being closed by the attachment when the mold is being formed, they arefree for the molten metal to enter during the casting with the resultthat lugs like the lugs 19, shown in Figs. 4 and 5, are cast in whichthe chaplet forms a bridge open on both sides and with .sufiicient spacebeneath it for the bolt or screw 15 to enter withoutthe end coming incontact with the bottom of the lug after being turned down so as totightly secure any casting to the lug which may be desired. It isobvious that any one of variety of small perforations or openings in theends of the chaplet through which the metal may flow, will accomplishthe purpose of the round holes 9, 9

Referring to the casting 8 in Fig. 7, or similar castings it isunderstood that each of the lugs is to be constructed as above cescribedwith a screw threaded hole 18 in its top to receive a screw or bolt 15for the purpose of securing a casting or any other part thereto, asstated in the specification of my said two Letters Patent.

My invention is adapted to provide a lug ee /e01 upon a casting at anyangle to the main body of the casting that may be desired. In forming alug at any angle other than a right angle, it is necessary to employcertain modifications or" the means above shown and described. Referringto Fig. 6, in the attachment 16 the recesses or slits 13 extend throughthe edges of the attachment. The stud 20, secured to or made a part ofthe pattern is provided to support the chaplet in the recesses 13 at theangle required for the lug to be cast. The recesses 13 are open throughthe edges of the attachment, so as to permit the chaplet to be liftedout of the attachment and to be withdrawn therefrom by the cope afterthe mold is formed. The stud 20, while located in front- .of the opening1% on one side of the chaplet,

is of such small dimensions as not to interfere with access to saidopening for all practical purposes. Y

It is obvious that by this method of casting, the holes in the lugs areaccurately locate-d, that all danger of defacing the casting byaccidentally drilling through it is obviated, and as no tapping of thethread is required, there can be no breakage of the taps. The screws orbolts employed are selected with reference to their length, so as not toextend to the bottom of the space 1% shown in Figs. +1 and 5. The screwsor bolts are readily removed when occasion requires separation oi theparts for repairs or other purposes.

It is evident that there is also an advantage in this invention where itis necessary to provide a screw threaded hole in a casting in a placeinconvenient of access to a drill and tap.

The provision of the open space 11,

through the lug, is of great importance in case it becomes necessary toremove the bolt or screw for the purpose of repair, for the reason thatthe end of the screw or bolt is free from contact with the casting, isaccessible "from both sides of the lug, and does not become adheredthereto by reason of corrosion. Vlhere no such space is provided it isthen impossible to remove the bolt when desired without breaking it ordestroying the casting or redrilling and retapping the lug.

In the construction shown in my said two Letters Patent, the chaplet isformed with a base portion, and is made of sheet metal suiilcientlythick to provide for drilling and tapping a screw thread in the top, orinstead thereof a nut is employed in the upper part of the chaplet. v

In the present invention the chaplets may be made of differentthicknesses of sheet metal so as to adapt them to any desired purpose.No base portion is required for the chaplet and no core is needed withinthe chaplet in practicing my invention. It is to be understood, ofcourse, that the chaplet is buried in sand as shown in Fig. 3, after themold is formed and before the metal is poured, and that only theextremities of the chaplet, where the holes 9, 9 are formed, areuncovered and exposed to the molten metal in the casting process. Byreason of the molten metal flowing around the free ends of the chapletand through the holes 9 the chaplet becomes an integral part of thecasting and forms a lug of great strength and security.

What I claim and desire to secure by Letters Patent is:

1. An article of manufacture consisting of a channel shaped chaplet foruse in castings, having a screw threaded hole in its top.

2. An article of manufacture consisting of v a channel shaped chapletfor use in castings,

having a screw threaded hole in its top and openings near itsextremities.

3. In a metal casting, a lug having an opening through the same, and .ascrew threaded hole extending into said opening.

4. In a metal casting a lug having an opening through the same, and ascrew threaded hole extending into said. opening in a directiontransverse to the axis of said opening.

5. I11 a metal casting, a lug having a chaplet incorporated therein,said lug having a screw threaded hole formed therein during the processof casting, the axis of which hole is located at an acute angle to thebody of the casting.

In testimony whereof I have hereunto set my hand this 21st day of March,1925.

DOMINIOK CORDINO.

Certificate of Correction.

.s hereby certified that Letters Patent No. 1,587,901, granted June 8,1926, the application of Dominick Cordino, of Plymouth, Massachusetts,for an pro-venient in Metal Castings, was erroneously issued to ElmerLi. Briggs, XGCHtOl of said Cordino, whereas said Letters Patentshouldhave been issued to Dom Cordino, as assignee of the entire interest insaid Letters Patent, as shown by the records of assignments in thisoilice; and that the said Letters Patent should be read with thiscorrectiontherein that the same may conform to the record of the case inthe Patent Office.

Signed and sealed this 3d day of August, A. I). 1926.

[SEAL] M. J. MOORE,

Acting Commissioner of Patents.

